55505574 has 48 divisors (see below), whose sum is σ = 131302080. Its totient is φ = 17525160.

The previous prime is 55505557. The next prime is 55505581. The reversal of 55505574 is 47550555.

It is a happy number.

55505574 is a `hidden beast` number, since 55 + 50 + 557 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6229 + ... + 12239.

It is an arithmetic number, because the mean of its divisors is an integer number (2735460).

Almost surely, 2^55505574 is an apocalyptic number.

55505574 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55505574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65651040).

55505574 is an abundant number, since it is smaller than the sum of its proper divisors (75796506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55505574 is a wasteful number, since it uses less digits than its factorization.

55505574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6047 (or 6035 counting only the distinct ones).

The product of its (nonzero) digits is 87500, while the sum is 36.

The square root of 55505574 is about 7450.2063058683. The cubic root of 55505574 is about 381.4569506542.

The spelling of 55505574 in words is "fifty-five million, five hundred five thousand, five hundred seventy-four".